In Reply to: flywheel gear posted by Scott on January 15, 2020 at 15:15:34:
The others have given you good info.
Yes, it's ill fitting parts from you know where that is the problem.
I have welded a couple of those through the starter hole.
The technique is to have someone carefully hold the ground cable to the front crankshaft pully and nowhere else or you will arc through the main or rod bearings and ruin them.
If the flywheel is off the tractor and you can weld a bit then no big deal just weld it again.
Remember that the flywheel is cast iron so use a rod that is made for that. One stick of special rod is maybe $2 vs a new ring gear for $? and maybe the same ill fitting part if you buy a new one. It will last for another 40 years and can be ground off and fixed again. 4 good 1/2" tacks evenly spaced is enough.
A few years ago I bought an 8N that the PO had to have the ring gear replaced. New ring gear did the same thing. He got disgusted, washed his hands of it and I bought the tractor. I welded it through the starter hole - with good rod - then resold it. Made about $500 in an hour or two which of course I whizzed away on more parts for my own tractor.